@article{prowazek_1909,  title={Duplicidade morfolojica nos infuzorios ciliados},  volume={1},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761909000200004},  DOI={10.1590/S0074-02761909000200004},  number={2},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Prowazek, S. von},  year={1909},  month={Aug},  pages={105–108} }